The Sleeping Beauty

The Sleeping Beauty problem is a thought experiment in probability and interpretation of knowledge. In this scenario, a woman named Sleeping Beauty is put to sleep on Sunday and, with a coin flip, is awakened either once on Monday (if the coin lands heads) or twice (if tails, on Monday and Tuesday). After each awakening, she does not remember previous awakenings. When she first wakes up, what is the probability that the coin landed on heads? The challenge lies in understanding how to evaluate her knowledge and beliefs based on limited information, raising questions about subjective probability.